Seminar PPT on Bluetooth based Home Automation for controlling home appliances using bluetooth supported devices.

1. Based Home Automation

2. What is Home Automation?
• Home Automation gives you access to control
devices in your home from a mobile device
anywhere in the world.
• Lighting, appliances, electrical outlets, heating
and cooling systems– are hooked up to a
bluetoothly controllable network.
• Provide improved convenience, comfort, energy,
efficiency and security.

3. Introduction
• There is an increasing demand for smart homes, where appliances react
automatically to changing environmental conditions and can be easily
controlled through one common device.
• This project presents a possible solution whereby the user controls devices
by using their existing mobile phone ,where control is communicated to the
Microcontroller from a mobile phone through its Bluetooth interface.
• The aim of this project is to design a circuit such that one can control home
or industrial appliances using the help of bluetooth.
• Using bluetooth to control appliances reduces human efforts without
compromising on efficiency. It also saves time.
• This circuit can be operated upto a distance of 5-10 metres depending upon
the bluetooth which we use.

4. Technology Used
• Bluetooth
• DTMF(Dual Tone Multiple Frequency)
• Microcontroller
• Flip-Flop(Latch)

5. Bluetooth Module
• HC-05 is a Bluetooth Smart
module targeted for low-power
sensors and accessories.
• It integrates all features required for
a Bluetooth Smart application.
• It is powered directly from a
standard 3V coin cell battery or a
voltage regulator.
• In the lowest power sleep mode it
merely consumes 500 nA and will
wake up within a few hundred
microseconds.

6. DTMF
•It receives
dual sine
wave tone.
•It generates
4 Bit binary
outputs.

7. Microcontroller
• Introduced in 1981 by Intel
corp.
• 8 bit microcontroller
• 4K bytes internal ROM
• 128 bytes internal RAM
• Four 8-bit I/O ports (P0 -
P3).
• All four ports are
bidirectional
• Max. of 64k bytes of on
chip ROM

8. Relay(Latch)
• A relay is an electrically
operated switch.
• Relays are used where it is
necessary to control a
circuit by a low-power
signal.
• Relays protect electrical
circuits from overload or
faults.

9. Required Components
1. BLUETOOTH PHONE
2. MICROCONTROLLER IC (ATM89S51)
3. BLUETOOTH MODULE (>2.0.1)
4. RELAY
5. TRANSFORMER (220V/12V)
6. VOLTAGE REGULATOR IC 7805
7. LED’S AND BULB’S
8. RESISTOR,CAPICITOR AND CONNECTING WIRES
9. SUPPLY BOARD

10. Block Diagram

11. Working Principle
• First Bluetooth module connected to the phone by the Bluetooth.
• Bluetooth phone already have a application to provide the
interference between mobile and the Bluetooth module.
• By using the application ,the mobile send the command signal to
microcontroller by the Bluetooth.
• Bluetooth and relay IC is connect to the microcontroller by its pins.
• The relay is connected to the load by its pins.
• When microcontroller receives the command from mobile ,it operate
the load.

12. Interface

13. Advantages
• Quick response is achieved.
• Easy to maintain and repair.
• Design is efficient and low cost.
• Power consumption is low.
• Controlling electrical devices wirelessly
• Saves electricity.
• We can control appliances from any place round the room.

14. Disadvantages
• This system is not capable of displaying the feed back status
of the devices being operated.
• Number of electrical appliances that can be controlled by this
circuit is limited.
• The range is limited (upto 15m).

15. Applications
• Yet there is an increasing demand
for smart homes, where appliances
react automatically to changing
environmental conditions and can
be easily controlled through one
common device.
• This wireless technology is
especially useful in home
environment, where there exists
hardly any infrastructure to
interconnect intelligent appliances.